diff --git a/FastGithub.UI/App.xaml.cs b/FastGithub.UI/App.xaml.cs
index 24deb27..b519576 100644
--- a/FastGithub.UI/App.xaml.cs
+++ b/FastGithub.UI/App.xaml.cs
@@ -1,4 +1,5 @@
-using System.Diagnostics;
+using Microsoft.Win32;
+using System.Diagnostics;
 using System.IO;
 using System.Threading;
 using System.Windows;
@@ -22,7 +23,8 @@ namespace FastGithub.UI
                 return;
             }
 
-            this.fastGithub = StartFastGithub();  
+            this.fastGithub = StartFastGithub();
+            SetWebBrowserVersion();
             base.OnStartup(e);
         }
 
@@ -51,6 +53,13 @@ namespace FastGithub.UI
                 CreateNoWindow = true
             };
             return Process.Start(startInfo);
-        } 
+        }
+
+        private static void SetWebBrowserVersion()
+        {
+            var emulation = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION", true);
+            var key = $"{Process.GetCurrentProcess().ProcessName}.exe";
+            emulation.SetValue(key, 9000, RegistryValueKind.DWord);
+        }
     }
 }
diff --git a/FastGithub.UI/FastGithub.UI.csproj b/FastGithub.UI/FastGithub.UI.csproj
index f2842fe..57d94cc 100644
--- a/FastGithub.UI/FastGithub.UI.csproj
+++ b/FastGithub.UI/FastGithub.UI.csproj
@@ -126,7 +126,10 @@
     <Resource Include="app.ico" />
   </ItemGroup>
   <ItemGroup>
-    <Resource Include="Images\reward.png" />
+    <Resource Include="Resource\reward.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="Resource\cert.html" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/FastGithub.UI/MainWindow.xaml b/FastGithub.UI/MainWindow.xaml
index 14572a2..0f77195 100644
--- a/FastGithub.UI/MainWindow.xaml
+++ b/FastGithub.UI/MainWindow.xaml
@@ -145,20 +145,20 @@
     <Grid Background="#00ffffff">
         <TabControl Style="{StaticResource TabControlWithUnderLineStyle}" Foreground="Black" Background="Transparent" BorderBrush="Transparent" BorderThickness="0">
             <TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Header="流量监控" Height="40" Width="100" Margin="5 0" FontSize="18">
-                <Grid Margin="16">
-                    <local:FlowChart x:Name="flowChart" />
+                <Grid Background="#f7f7f7">
+                    <local:FlowChart Margin="16" />
                 </Grid>
             </TabItem>
 
             <TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Header="证书验证" Height="40" Width="100" Margin="5 0" FontSize="18">
-                <Grid Margin="16">
-
+                <Grid Background="#f7f7f7">
+                    <WebBrowser Name="webCert"  />
                 </Grid>
             </TabItem>
 
             <TabItem Style="{StaticResource TabItemExWithUnderLineStyle}" Header="一支华子" Height="40" Width="100" Margin="5 0" FontSize="18">
-                <Grid Margin="16"  >
-                    <Image Source="Images/reward.png"   />
+                <Grid Background="#f7f7f7">
+                    <Image Source="Resource/reward.png" Margin="16" />
                 </Grid>
             </TabItem>
         </TabControl>
diff --git a/FastGithub.UI/MainWindow.xaml.cs b/FastGithub.UI/MainWindow.xaml.cs
index 6e28001..63bab33 100644
--- a/FastGithub.UI/MainWindow.xaml.cs
+++ b/FastGithub.UI/MainWindow.xaml.cs
@@ -1,10 +1,8 @@
 using System;
 using System.Diagnostics;
 using System.IO;
-using System.Net.Http;
-using System.Threading.Tasks;
 using System.Windows;
-using System.Windows.Forms;
+using System.Windows.Input;
 using System.Windows.Interop;
 
 namespace FastGithub.UI
@@ -14,7 +12,7 @@ namespace FastGithub.UI
     /// </summary>
     public partial class MainWindow : Window
     {
-        private NotifyIcon notifyIcon;
+        private System.Windows.Forms.NotifyIcon notifyIcon;
         private const string FAST_GITHUB = "FastGithub";
         private const string PROJECT_URI = "https://github.com/dotnetcore/FastGithub";
 
@@ -22,23 +20,23 @@ namespace FastGithub.UI
         {
             InitializeComponent();
 
-            var about = new MenuItem("关于(&A)");
+            var about = new System.Windows.Forms.MenuItem("关于(&A)");
             about.Click += (s, e) => Process.Start(PROJECT_URI);
 
-            var exit = new MenuItem("退出(&C)");
+            var exit = new System.Windows.Forms.MenuItem("退出(&C)");
             exit.Click += (s, e) => this.Close();
 
-            this.notifyIcon = new NotifyIcon
+            this.notifyIcon = new System.Windows.Forms.NotifyIcon
             {
                 Visible = true,
                 Text = FAST_GITHUB,
-                ContextMenu = new ContextMenu(new[] { about, exit }),
+                ContextMenu = new System.Windows.Forms.ContextMenu(new[] { about, exit }),
                 Icon = System.Drawing.Icon.ExtractAssociatedIcon(System.Windows.Forms.Application.ExecutablePath)
             };
 
             this.notifyIcon.MouseClick += (s, e) =>
             {
-                if (e.Button == MouseButtons.Left)
+                if (e.Button == System.Windows.Forms.MouseButtons.Left)
                 {
                     this.Show();
                     this.Activate();
@@ -51,7 +49,22 @@ namespace FastGithub.UI
             {
                 var version = FileVersionInfo.GetVersionInfo(fileName);
                 this.Title = $"{FAST_GITHUB} v{version.ProductVersion}";
-            } 
+            }
+
+       
+            this.webCert.AddHandler(KeyDownEvent, new RoutedEventHandler(WebBrowser_KeyDown), true);
+            var resource = Application.GetResourceStream(new Uri("Resource/cert.html", UriKind.Relative));
+            this.webCert.NavigateToStream(resource.Stream);
+        }
+
+        private void WebBrowser_KeyDown(object sender, RoutedEventArgs e)
+        { 
+            var @event = (KeyEventArgs)e;
+            if (@event.Key == Key.F5)
+            {
+                var resource = Application.GetResourceStream(new Uri("Resource/cert.html", UriKind.Relative));
+                this.webCert.NavigateToStream(resource.Stream);
+            }
         } 
 
         protected override void OnSourceInitialized(EventArgs e)
diff --git a/FastGithub.UI/Resource/cert.html b/FastGithub.UI/Resource/cert.html
new file mode 100644
index 0000000..20abb57
--- /dev/null
+++ b/FastGithub.UI/Resource/cert.html
@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" crossorigin="anonymous">
+    <title>证书验证</title>
+    <style type="text/css">
+        body {
+            overflow-x: hidden;
+            background-color: #f7f7f7;
+        }
+
+        blockquote {
+            border-left: 5px solid #c5c5c5;
+            background-color: #f1f1f1;
+        }
+
+        .badge {
+            background-color: #999;
+        }
+
+        code {
+            cursor: pointer;
+        }
+    </style>
+</head>
+
+<body onContextMenu="return false;">
+    <div class="container">
+        <div>
+            <h3>Firefox</h3>
+            <blockquote>
+                <h4>建立安全连接失败</h4>
+                <p><small>连接到 github.com 时发生错误。对等端的证书有一个无效的签名。</small> </p>
+                <p><small> 错误代码：SEC_ERROR_BAD_SIGNATURE</small> </p>
+            </blockquote>
+
+            <h4>解决办法</h4>
+            <p>
+                <span class="badge">1</span>
+                <span>地址栏输入：</span><code>about:config</code>
+            </p>
+            <p>
+                <span class="badge">2</span>
+                <span>输入首选项名称：</span><code>security.enterprise_roots.enabled</code>
+            </p>
+            <p>
+                <span class="badge">3</span>
+                <span>修改值为：</span><code>true</code>
+            </p>
+        </div>
+        <hr />
+        <div>
+            <h3>git.exe</h3>
+            <blockquote>
+                <h4>clone、pull或push等异常 </h4>
+                <p><small>fatal: unable to access 'https://github.com/xxx.git/'</small> </p>
+                <p><small>SSL certificate problem: unable to get local issuer certificate</small> </p>
+            </blockquote>
+
+            <h4>解决办法</h4>
+            <p>
+                <span class="badge">1</span>
+                <span>管理员身份运行：</span><code>cmd</code>
+            </p>
+            <p>
+                <span class="badge">2</span>
+                <span>在cmd输入：</span><code>git config --global http.sslverify false</code>
+            </p>
+        </div>
+    </div>
+
+    <script type="text/javascript">
+        var codes = document.getElementsByTagName('code');
+        for (var i = 0; i < codes.length; i++) {
+            var code = codes[i];
+            code.setAttribute('title', '点击复制');
+            code.addEventListener("click", function () {
+                window.clipboardData.setData("Text", this.outerText);
+            });
+        }
+    </script>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/FastGithub.UI/Images/reward.png b/FastGithub.UI/Resource/reward.png
similarity index 100%
rename from FastGithub.UI/Images/reward.png
rename to FastGithub.UI/Resource/reward.png